1. UB-SEDS Flight Computer Development Flight Test
Overview
UB-SEDS has been working on the development of custom electronic suit of rocketry flight
computer equipment for the use in both our current level of High Power rockets, and future
high power rockets. Currently, we are entering the testing phase for the core unit, which is a
basic flight computer, and are also in the development phase for attachments for GPS and
direct telemetry, with hopes of finishing all three by early May. With flight testing, we hope to
gain data on the flight readiness of the system. This includes both sensor data, unit stability
under real world flight conditions, and accuracy of the unit. Configuration on the design is
currently modular, with software being setup to accommodate multiple linked or unlinked
units. A single integrated unit is possible if desired for the payload. Total payload mass is
estimated to be under 500g. Below is a summary of the various devices we would like to flight
test. With the GPS Attachment, any flight profile is suitable for the flight computer, although a
parabolic or semi-parabolic would be ideal.
Summary of Devices
Flight Computer – Build Development / Testing
The primary component, this component houses the primary processing unit, an Arduino Pro
Mini chip based on the ATMega microcontroller. It also includes a basic barometric sensor for
deployment data, as well as a relay system for pyrotechnic outputs. This component also holds
connection points for additional hardware. Current version 1.2, Version 1.3 to include larger
memory, or SD card interface.
2” wide x 6” long x 2” high
Weight: 150g – 300g (depending on battery configuration)
Recommended max acceleration: 100g for 11ms
4 Pyrotechnic Channels out
Built in tone-based max altitude indicator
GPS Attachment – Parts Acquisition
Currently acquiring parts, with expected integration in early May. This component allows for
higher accuracy, and will also allow for tracking with integration with telemetry system. Based
off the EM-406A GPS module from USGlobalSat.
2”x2”x.75”
Weight: 150g (max) estimated
5 meter accuracy
Telemetry Unit – Parts Acquisition & Design
To be used for data relay with ground, as well as a backup pyrotechnic activation method.
This is based off the XBee Pro 900, operating on the 900 MHz band.
Estimated size: 2” x 4” x 2” ; Antenna: 7”
Weight: 100g estimated
